Walter 53G247 BIO-RUST™ Rust & Mineral Remover and Brightener 5.2 gal Pail Non-caustic rust removers that safely eliminates rust on all ferrous alloys. Soak for up to 24 hours for best results. Non-hazardous, OSHA, and WHMIS compliant. Product Features Nonflammable, solvent-free, phosphate-free, VOC-free Neutral range pH, non-caustic and biodegradable Removes rust without attacking surface material Non hazardous—OSHA and WHMIS compliant High workload—can remove 1.0kg (2.2lbs) of iron oxide per 20L (5 gallons) NSF Category A2, Register #146173 Applications Removal of rust and other metallic particles Designed for immersion applications only. Deeply rusted parts may require longer soaking time. After application of BIO-RUST®, rinse parts in water to remove loosened contaminants. Nonflammable, solvent-free, phosphate-free, VOC-free Neutral range pH, non-caustic and biodegradable Removes rust without attacking surface material Non hazardous—OSHA and WHMIS compliant High workload—can remove 1.0kg (2.2lbs) of iron oxide per 20L (5 gallons) NSF Category A2, Register #146173 Removal of rust and other metallic particles Designed for immersion applications only. Deeply rusted parts may require longer soaking time. After application of BIO-RUST®, rinse parts in water to remove loosened contaminants.